视频抽帧

目录

• 视频抽帧
  • 1. maven依赖
  • 2. 实例

视频抽帧

1. maven依赖

<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv-platform</artifactId>
<version>1.5</version>
</dependency>

2. 实例

public class CommonUtils {
    private final static Logger log = LoggerFactory.getLogger(CommonUtils.class);
    
	/**
     * 视频抽帧(每second抽一帧)
     * @param videoPath
     * @param second 
     * @return
     */
    public static List<String> videoFrameExtract(String videoPath, Integer second){
        long start = System.currentTimeMillis();
        ArrayList<String> fl = new ArrayList<>();  // 返回的抽帧图片地址
        String saveFilePrefix = videoPath.substring(0, videoPath.lastIndexOf(".")); // 保存的文件名前缀
        Frame frame;
        FFmpegFrameGrabber ffg = null;
        int fps = 0;  // 帧率
        long videoTime = 0L;  // 视频时长
        int frameCount = 0; // 视频总帧数(该视频有多少张图片)
        try{
            ffg = new FFmpegFrameGrabber(videoPath);
            ffg.start();
            fps = (int)ffg.getFrameRate();
            videoTime = ffg.getLengthInTime() / (1000*1000);
            while ((frame=ffg.grabImage()) != null){
                if (frame.image != null){
                    // 获取特定帧(间隔n秒获取一帧图片)
                    if (frameCount>=1 && frameCount%(second*fps)==0){
                        // 文件保存
                        String fileName = saveFilePrefix + "-" + frameCount + ".jpg";
                        boolean saveFlag = false;
                        try {
                            Java2DFrameConverter converter = new Java2DFrameConverter();
                            BufferedImage bufferedImage = converter.getBufferedImage(frame);
                            saveFlag = ImageIO.write(bufferedImage, "jpg", new File(fileName));
                            if (saveFlag){
                                fl.add(fileName);
                            }

                        }catch (Exception e){
                            log.error("帧图片保存异常({}):{}", fileName, String.valueOf(e));
                        }
//                        log.info("帧图片保存({}):{}", fileName, saveFlag);
                    }
                }
                frameCount ++;
            }
        }catch (Exception e){
            e.printStackTrace();
            log.error("视频抽帧异常({}):{}", videoPath, String.valueOf(e));
        }finally {
            try {
                if (ffg != null){
                    ffg.stop();
                } 
            }catch (Exception ignored){}
        }
        long cost = System.currentTimeMillis() - start;
        log.info("视频抽帧({})-帧率:{}fps;时长:{}s;总帧数:{};抽帧耗时:{}ms;抽帧数据({}):{};", videoPath, fps, videoTime, frameCount, cost, fl.size(),  fl);
        return fl;
    }

    public static void main(String[] args) {
        videoFrameExtract("F:\\test\\file\\test\\a.mp4", 1);
    }
}